Direct Observation of Dirac Cone in Multilayer Silicene Intercalation Compound CaSi2

被引：71

作者：

Noguchi, Eiichi ^{[1
]}

Sugawara, Katsuaki ^{[2
]}

Yaokawa, Ritsuko ^{[3
]}

Hitosugi, Taro ^{[2
,4
]}

Nakano, Hideyuki ^{[3
,4
]}

Takahashi, Takashi ^{[1
,2
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Tohoku Univ, Adv Inst Mat Res, WPI Res Ctr, Sendai, Miyagi 9808577, Japan

[3] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[4] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

ADVANCED MATERIALS | 2015年 / 27卷 / 05期

关键词：

angle-resolved photoemission spectroscopy (ARPES); dirac cone; fermi surface; intercalation; silicene; PHASE;

D O I：

10.1002/adma.201403077

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Calcium-intercalated multilayer silicene CaSi2 exhibits a massless Dirac-cone p-electron-band dispersion like graphene, while the Dirac point is about 2 eV away from the Fermi level due to diiimide-based charge transfer from the Ca atoms to the silicene layers. This indicates that the graphene-like electronic structure with a massless Dirac cone is stably formed in the metal-intercalated multilayer silicene.

引用

页码：856 / 860

页数：5

共 27 条

[1] Presence of gapped silicene-derived band in the prototypical (3 x 3) silicene phase on silver (111) surfaces [J].

Avila, J. ;

De Padova, P. ;

Cho, S. ;

Colambo, I. ;

Lorcy, S. ;

Quaresima, C. ;

Vogt, P. ;

Resta, A. ;

Le Lay, G. ;

Asensio, M. C. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2013, 25 (26)

[2] Quasiparticle dynamics in graphene [J].

Bostwick, Aaron ;

Ohta, Taisuke ;

Seyller, Thomas ;

Horn, Karsten ;

Rotenberg, Eli .

NATURE PHYSICS, 2007, 3 (01) :36-40

[3] Two- and One-Dimensional Honeycomb Structures of Silicon and Germanium [J].

Cahangirov, S. ;

Topsakal, M. ;

Akturk, E. ;

Sahin, H. ;

Ciraci, S. .

PHYSICAL REVIEW LETTERS, 2009, 102 (23)

[4] Atomic structure of the √3 x √3 phase of silicene on Ag(111) [J].

Cahangirov, Seymur ;

Ozcelik, Veli Ongun ;

Xian, Lede ;

Avila, Jose ;

Cho, Suyeon ;

Asensio, Maria C. ;

Ciraci, Salim ;

Rubio, Angel .

PHYSICAL REVIEW B, 2014, 90 (03)

[5] Electronic structure of silicene on Ag(111): Strong hybridization effects [J].

Cahangirov, Seymur ;

Audiffred, Martha ;

Tang, Peizhe ;

Iacomino, Amilcare ;

Duan, Wenhui ;

Merino, Gabriel ;

Rubio, Angel .

PHYSICAL REVIEW B, 2013, 88 (03)

[6] Evidence of graphene-like electronic signature in silicene nanoribbons [J].

De Padova, Paola ;

Quaresima, Claudio ;

Ottaviani, Carlo ;

Sheverdyaeva, Polina M. ;

Moras, Paolo ;

Carbone, Carlo ;

Topwal, Dinesh ;

Olivieri, Bruno ;

Kara, Abdelkader ;

Oughaddou, Hamid ;

Aufray, Bernard ;

Le Lay, Guy .

APPLIED PHYSICS LETTERS, 2010, 96 (26)

[7]

Dresselhaus M. S., 2001, ADV PHYS, V51, P186

[8] TRANSFORMATION OF 3-CONNECTED SILICON NETS IN CASI2 [J].

EVERS, J .

JOURNAL OF SOLID STATE CHEMISTRY, 1979, 28 (03) :369-377

[9] Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene [J].

Ezawa, Motohiko .

PHYSICAL REVIEW LETTERS, 2012, 109 (05)

[10] Quantum Hall Effects in Silicene [J].

Ezawa, Motohiko .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2012, 81 (06)

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